Macron released an abridged recording of the call, which was made on Tuesday, on his Twitter account.

In the conversation, the former American president wished Macron “all the best” and advised him to work hard all the way through the campaign, because the last few days may make all the difference.

“I will fight till the last minute. And we will keep it in touch and our teams will liaison in order to organize a new contact and see how to work together if I am going to the run-off,” the French candidate replied.

Polls forecast that Macron will be pitted against right-wing challenger Marine Le Pen in a second round of France’s presidential election.

It was not immediately clear how exactly Barack Obama’s “team” was helping the Macron campaign. The ex-president does not currently hold any elected office, but remains widely popular in America’s Democratic Party, which is still reeling from a demoralizing surprise defeat in last year’s presidential election.

The release of the phone call comes as the current American administration is still being accused of winning the oval office with secret help from Russia. Trump has lost several members of his team over allegations that they had undisclosed contacts with Russian officials during the election campaign.

Obama’s office said his call did not constitute an endorsement of Macron.

“President Obama appreciated the opportunity to hear from Mr. Macron about his campaign and the important upcoming presidential election in France, a country that President Obama remains deeply committed to as a close ally of the United States, and as a leader on behalf of liberal values in Europe and around the world,” his spokesman Kevin Lewis said.

“An endorsement was not the purpose of the call, as President Obama is not making any formal endorsement in advance of the run-off election on Sunday,” he said.

Politico cites a source as saying that the call from Obama was made at the request of Macron, who wants to keep France’s policies in line with the former US president’s globalist vision. Vox says that Obama apparently hasn’t been in contact with any of the other French presidential candidates.